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11111nata11111 [884]
3 years ago
10

Why is hydroelectric power considered to be an example of multiple transfers of energy?

Physics
1 answer:
Radda [10]3 years ago
7 0
Hydroelectric power is considered to be an example of multiple transfers of energy because potential energy when the water is in the reservoir turns into kinetic energy making the water move to the dam and then the dam moves into the turbine turning it to electric energy.  
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Answer:

The speed after being pulled is 2.4123m/s

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The work realize by the tension and the friction is equal to the change in the kinetic energy, so:

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W_T=T*x*cos(0)=32N*3.2m*cos(30)=88.6810J\\W_F=F_r*x*cos(180)=-0.190*mg*x =-0.190*10kg*9.8m/s^{2}*3.2m=59.584J\\ K_i=0\\K_f=\frac{1}{2}*m*v_f^{2}=5v_f^{2}

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Then, replacing the values on the equation and solving for v_f, we get:

W_T+W_F=K_f-K_i\\88.6810-59.5840=5v_f^{2}\\29.097=5v_f^{2}

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